Fireproof shutter, door, &amp;c.



No. 700,873. I Patented May 27, I902.

- J. G. WILSON.

FIREPROOF SHUTTER, DOOR, m.

(Application filed Feb. 5, 1902.)

(No Model.)

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INVENTOR 5 I 17635.

6 Yg g ATTORNE m: NORRIS PUER; cu, PNOTO-LIYHD.. wnsumsron, D, c,

WITNESSES:

UNITED STATES PATENT OFFICE.

JAMES GODFREY IVILSON, OF NEW YORK, N. Y.

FIREPROOF SHUTTER, DOOR, 800.

SPECIFICATION'forming part of Letters Patent No. 700,873, dated May 27,1902.

Application filed February 5,1902. Serial. No. 92,710. (No model.)

To all whom, it may concern.-

Be it known that I, J AMES-GODFREY WIL- SON, a subject of Edward VII,King of Great Britain, residing at New York, in the county of New Yorkand State of New York, have invented certain new and useful Improvementsin Fireproof Shutters, Doors, &c.; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make andusethe same.

My invention relates to certain improvements in and relating toshutters, doors, &c. but particularly relates to doors and shutters thatare provided with a metal sheathing.

The object of my improvement is to overcome a serious disadvantage thatat present attaches to articles of this sort; and with this end in Viewmy invention consists in certain details of construction and combinationof parts, such as will be hereinafter fully set forth and thenspecifically be designated by the claims.

In the accompanying drawings, which form a part of this application,Figure 1 is a broken isometric perspective of a shutter constructed inaccordance with my improvement, and

Fig. 2 a vertical section of a portion of such shutter.

Similar numbers of reference denote like parts in both figures of thedrawings.

The particular-style of shutter which I have illustrated is composed ofWooden slats or bars hinged together, so as to fit closely and becapable of rolling, while the surfaces of these slats or bars arecovered with sheet metal, with preferably a layer of asbestos interposedbetween the wood and the metal which covers the outer face of said bars.

I have ascertained that a shutter or door composed of Wooden bars orslats sheathed with metal is not fireproof for the following reason:When such a shutter is subjected to intense heat, the wood will beburned and will become charcoal. gases will be liberated which by theirgreat pressure will pufi out and burst the metal sheathing, so that thefireproof quality of the latter is destroyed.

I have ascertained by actual test that if a As the wood burns,

plurality of holes or openings be made in the metal sheathing on theoutside face or faces torted by intense heat.

Referring to the drawings, 1 represents the Wooden bars or slats; 2,themetal sheathing; 3, the asbestos interposed between the wooden barsor slats and the metal sheathing which covers the outside faces of'these bars or slats, and 4 the perforations through the sheathings ofthe variousbars or slats. If desired, these perforations may be pluggedwith any suitable fusible plug 5, as shown in the instance of the lowerslat at Fig-2, although this is a mere matter of choice and has nothingto do with my invention.

Of course I do not wish to limit my invention to shutters or doorsspecifically, since it will be clear that my improvement may be appliedin the instance of any supposed fireproof structure which comprises acore or'interior of wood and an external metal sheathing, such asmetal-covered sliding or folding doors, window-casings, moldings, 850.

It will of course be clear that after the interior of the bars or slatsis burned into charcoal the latter, being a very poor conductor of heat,will not interfere with the fireproof nature of the structure; also,while the asbestos may be used as above set forth it will be clear thatthe samemight be dispensed with altogether or other suitable materialemployed as a substitute, and I do not wish to be limited in thisrespect.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. As an improved article of-manufacture, a fireproof structurecomprising an inner core or portion of Woodand an exterior sheathing ofmetal having its outer face perforated, substantially as set forth. 7

2. As an improved article of manufacture, a shutter or door having acore of Wood or the like and a sheathing of metal, the face of saidmetal havinga plurality of perforations, outside air and the woodencores, substansubstantially as set forth. tially as set forth. 1o 3. Asan improved article of manufacture, I In testimony whereof I affix mysignature a rolling or flexible shutter formed of wooden in presence oftwo Witnesses.

slats or bars and sheathings of metal around JAMES GODFREY WILSON. saidslats or bars, said metal sheathings hav- W'itnesses: ing in their outerfaces perforations whereby NATHL. BLOOM,

communication is established between-the W. P. \VAUGH.

